<script type="importmap">
    {
      "imports": {
        "vue": "/js/vue-3.3.4/dist/vue.esm-browser.js"
      }
    }
</script>

<div id="app"></div>

<script type="module">
  import { createApp } from 'vue'
  import MyComponent from './com.demo4.js'

  createApp(MyComponent).mount('#app')
</script>